I open and close my blinds everyday, and never noticed this type of beautiful light. Congratulations on an amazingly simple composition, and for pointing out this source of beauty in an everyday item.
It's a nice perspective that fits "everyday", though I don't see it fitting the "Wabi-Sabi" idea. Almost seems a little scary to me, like some horror movie posters suggesting something is on the other side of the door wanting to get in. punching up the contrast and shadows a bit may have given it some more oomph.
Simple yet beautiful. This is all about form and light. The unusual composition with the two silver circles to the left, the tops of the panels at hte bottom and the blind taking up most of the frame, works well for me. But most of all I love the striped light spilling through and to the side. Lovely.